Hi all. I love this community. This is my first post, sorry if this is not where it belongs. I have a question about NGK spark plugs as I am about to do some general maintenance on my 91 4Runner.

I have checked multiple sites and there seems to be 2 different sets of spark plug wires NGK makes that fit my yota. it is a 3vze, 5 speed, 4wd, built in august of 91 (8/91).

The model numbers are

NGK tx-12
&
NGK tx-50

What is the difference between them and why should I choose one over the other? I can’t seem to find an answer to this question anywhere else on the internet. Maybe I’m not searching very hard.

Also, any recommended NGK spark plugs to go with the wires would be good input as well.

Thank you for taking your time and hearing me out. Much appreciation . -Ben : )